Question

我是ASP.NET的新手，在如何在我的ASP.NET Web应用程序中调用内联用户定义函数时遇到了麻烦。

在这里，我在我的函数中传递了两个参数 - 一个是可用的休假（lv），另一个是持续时间（dr）。我只是从lv中减去dr并返回值。但我在调用函数时遇到问题。

我已经尝试过＆＃34; SELECT dbo.emp_leave_sub（lv，dr）作为剩余的＆＃34;而不是查询＆＃34; SELECT dbo.emp_leave_sub（lv，dr）FROM Employee1，其中Employee1.emp_id =＆＃39;＆＃34; + emp_id +＆＃34;＆＃39;＆＃34;但它没有用。我无法理解我做错了什么。

期待您的回复。任何帮助将受到高度赞赏。

以下是我的功能：

    ALTER FUNCTION dbo.emp_leave_sub(@available int, @duration int)
  RETURNS int
  AS
  -- Returns the availabe leave after deduction for the employee.
  BEGIN
  DECLARE @ret int;
  SELECT @ret = @available - @duration;
  RETURN @ret;
  END;


And this is from where I am calling my function :

    try
            {
                SqlDataReader rdr;
                SqlConnection conn = new SqlConnection (ConfigurationManager.
                ConnectionStrings["PMSConnectionString"].ConnectionString);
                conn.Open();

                string sub_leave = "SELECT dbo.emp_leave_sub(lv,dr) FROM       `  `               Employee1 where Employee1.emp_id='" + emp_id + "'";
                SqlCommand com2 = new SqlCommand(sub_leave, conn);

                com2.CommandType = CommandType.Text;

                using (conn)
                {
                    //read data from the table to our data reader
                    rdr = com2.ExecuteReader();

                    //loop through each row we have read
                    while (rdr.Read())
                    {
                        remaining = rdr.GetInt32(0);
                    }
                rdr.Close();
            }

Answer 1

尝试这样做：

SqlDataReader rdr;
using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["PMSConnectionString"].ConnectionString))
    {
            conn.Open();

            string sub_leave = "SELECT dbo.emp_leave_sub(@available,@duration) FROM Employee1 where Employee1.emp_id=@empid";
            SqlCommand com2 = new SqlCommand(sub_leave, conn);
            com2.Parameters.AddWithValue("@available", your value);
            com2.Parameters.AddWithValue("@duration", your value);
            com2.Parameters.AddWithValue("@empid", emp_id);
            com2.CommandType = CommandType.Text;

               //read data from the table to our data reader
               rdr = com2.ExecuteReader();
             //loop through each row we have read
               while (rdr.Read())
                {
                     remaining = rdr.GetInt32(0);
                }
    }
    rdr.Close();

在ASP.NET中调用UDF

1 个答案: